Jaw assembly for vises



y 1938- M. ZUGERMAYER 2,123,131

JAW ASSEMBLY FOR VISES Filed Jan. 25, 195'? mun A? M Z uge/"mayer wanna-.III

INVENTOR ATTORN EY Patented July 5, 1938 2,123,131; p g M .lAW ASSEMBLYFOR VISES Melmore Zugermayer, Southampton, Pa.

Application January 25, 1937, Serial No. 122,283

1 Claim.

The invention relates to a bench vise attachment and more especially toa jaw assembly for bench Vises.

The primary object of the invention is the provision of an attachment ofthis character, wherein a four-jaw assembly can be used in connectionwith the bench vise so that work can be gripped or clamped at fourpoints thereof to hold the work more firmly and securely and avoidingdamage thereto resultant in the clamping of such work in the double jawvise of the bench type.

Another object of the invention is the provision of an attachment ofthis character, wherein the same is susceptible of use in a horizontalplane or in a vertical position when associated with a bench vise sothat work can be firmly and securely held without liability of theshifting or Wobbling of such work when engaged in the attachment.

A further object of the invention is the provision of an attachment ofthis character, which in the assembly thereof is a unit in itself and isreadily and easily applied to a bench vise for use therewith and in thismanner converting the latter from a two-jaw to a four-jaw vise.

A further object of the invention is the provision of an attachment ofthis character, which is simple in its construction, thoroughly reliableand efiicient in operation, strong, durable, and inexpensive tomanufacture.

With these and other objects in view, the invention consists in thefeatures of construction, combination and arrangement of parts as willbe hereinafter more fully described, illustrated in the accompanyingdrawing, which discloses the preferred embodiment of the invention andpointed out in the claims hereunto appended.

In the accompanying drawing:

Figure 1 is a plan view of the attachment constructed in accordance withthe invention.

Figure 2 is a sectional view on the line 2--2 of Figure 1 looking in thedirection of the arrows and showing the attachment in a vise.

Figure 3 is a sectional view on the line 3--3 of Figure 1 looking in thedirection of the arrows.

Figure 4 is a fragmentary sectional view on the line 4--4 of Figure 1looking in the direction of the arrows.

Similar reference characters indicate corresponding parts throughout theseveral views in the drawing.

Referring to the drawing in detail, A designates generally aconventional type of bench vise having the fixed and adjustable jaws 5and B, respectively, and operating opposite each other,

the adjustable jaw 6 being moved toward and away from the fixed jaw by afeed screw I as is usual.

The attachment comprises a bed plate 8 preferably of flat sidedformation having the beveled corners 9 while centrally of this plate isa relatively large square shaped opening it while at one side edge ofthe said plate is an outwardly tapered centrally located extension I I.7

Above the bed plate 8, are arranged the op posed equilateral triangularshaped jaw sections I2 and I3, respectively, these being in pairs andextended from the flat bottoms I4 of the sections I2 are downwardlyextended abutment wings I5, these being bent at right angles from theinner edges of said sections I2 and are passed through the opening II]in the bed plate 8. The wings I5 at opposite ends are carried beyond theopening If! in the bed plate 8 while one of the sections I2 is rivetedat I6 or otherwise made fast to the bed plate 8 while the other sectionis slidable upon said bed plate and to the slidable section I2 isconnected at its longitudinal center a coiled retractile spring I! whichis also fixed at I8 close to the outer end of the extension II, thespring being designed to separate the sections I2 from each other to theextent of the opening It.

The sections I2 and I3 at the diagonal edges thereof are formed withupturned flanges I9 and the said flanges on the sections I3 at theirinner ends meet each other while the flanges I9 on the sections I2 attheir inner ends are separated from each other.

The flanges I9 on the sections I2 are formed with guides 20 with whichare interfitted the flanges IQ of the sections I3 and such flanges ofboth sections I2 and I3 constitute a four-jaw assembly for attachment tothe vise A.

In the attachment of the four-jaw assembly, the wings I5 are insertedbetween the jaws 5 of said vise A with the wing on the fixed section I2contacting with the fixed jaw 5 of said vise while the wing on theslidable section I2 contacts with the adjustable jaw I6 and thus on theturning of the screw I the slidable section I2 and the sections I3 willbecome adjusted relative to the fixed section I2 for increasing ordecreasing the capacity of the four-jaw assembly for the firm securingof Work within said assembly so that the work will be clamped at fourpoints thereof or at four sides or faces of the same.

When the adjustable jaw B of the vise is moved away from the fixed jaw5, the spring I! by its tension becomes active to have the slidablesections I2 of the assembly separate and thus the an outwardly taperedextension formed on said bed plate, a coiled retractile spring havingconnection with said extension and one of the sections, guides formed onthe outer edge flanges of a pair of the opposed sections and adjustablyinterfitting the flanges of the remaining opposed sections for efiectinga four-jaw assembly, and downwardly extending abutment wings engagedthrough the center opening of the bed and for contact with the jaws ofthe vise when interposed therebetween, one wing being carried by thesection having'the. spring attached thereto and the other wing carriedby the section opposed thereto.

MELMORE ZUGERMAYER.

